Update to drupal 8.0.0-rc1. For more information, see https://www.drupal.org/node/2582663

vendor/zendframework/zend-stdlib/src/ArraySerializableInterface.php

@@ -0,0 +1,28 @@
+<?php
+/**
+ * Zend Framework (http://framework.zend.com/)
+ *
+ * @link      http://github.com/zendframework/zf2 for the canonical source repository
+ * @copyright Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
+ * @license   http://framework.zend.com/license/new-bsd New BSD License
+ */
+
+namespace Zend\Stdlib;
+
+interface ArraySerializableInterface
+{
+    /**
+     * Exchange internal values from provided array
+     *
+     * @param  array $array
+     * @return void
+     */
+    public function exchangeArray(array $array);
+
+    /**
+     * Return an array representation of the object
+     *
+     * @return array
+     */
+    public function getArrayCopy();
+}